Denso Iridium Power Spark plugs IW16-5305

DENSO Iridium Spark Plugs use the highest quality materials, and are produced in our state of the art manufacturing facilities.

Below is a cross-section of the highlights of the Iridium plug. Click on any of the yellow circles for a detailed explanation.

DENSO Spark Plug
1 Insulator 4 Copper-Cored Center Electrode 7 Tapered Cut
2 Five-Rib Design 5 U-Groove Ground Electrode 8 360° Laser Welding
3 Copper-Glass Seal 6 Patented Iridium Center Electrode 9 100% Pre-Fired